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import unittest
from pygame.threads import FuncResult, tmap, WorkerQueue, Empty, STOP
from pygame import threads, Surface, transform
import time
class WorkerQueueTypeTest(unittest.TestCase):
def test_usage_with_different_functions(self):
def f(x):
return x + 1
def f2(x):
return x + 2
wq = WorkerQueue()
fr = FuncResult(f)
fr2 = FuncResult(f2)
wq.do(fr, 1)
wq.do(fr2, 1)
wq.wait()
wq.stop()
self.assertEqual(fr.result, 2)
self.assertEqual(fr2.result, 3)
def test_do(self):
"""Tests function placement on queue and execution after blocking function completion."""
# __doc__ (as of 2008-06-28) for pygame.threads.WorkerQueue.do:
# puts a function on a queue for running _later_.
# TODO: This tests needs refactoring to avoid sleep.
# sleep is slow and unreliable (especially on VMs).
# def sleep_test():
# time.sleep(0.5)
# def calc_test(x):
# return x + 1
# worker_queue = WorkerQueue(num_workers=1)
# sleep_return = FuncResult(sleep_test)
# calc_return = FuncResult(calc_test)
# init_time = time.time()
# worker_queue.do(sleep_return)
# worker_queue.do(calc_return, 1)
# worker_queue.wait()
# worker_queue.stop()
# time_diff = time.time() - init_time
# self.assertEqual(sleep_return.result, None)
# self.assertEqual(calc_return.result, 2)
# self.assertGreaterEqual(time_diff, 0.5)
def test_stop(self):
"""Ensure stop() stops the worker queue"""
wq = WorkerQueue()
self.assertGreater(len(wq.pool), 0)
for t in wq.pool:
self.assertTrue(t.is_alive())
for i in range(200):
wq.do(lambda x: x + 1, i)
wq.stop()
for t in wq.pool:
self.assertFalse(t.is_alive())
self.assertIs(wq.queue.get(), STOP)
def test_threadloop(self):
# __doc__ (as of 2008-06-28) for pygame.threads.WorkerQueue.threadloop:
# Loops until all of the tasks are finished.
# Make a worker queue with only one thread
wq = WorkerQueue(1)
# Ocuppy the one worker with the threadloop
# wq threads are just threadloop, so this makes an embedded threadloop
wq.do(wq.threadloop)
# Make sure wq can still do work
# If wq can still do work, threadloop works
l = []
wq.do(l.append, 1)
# Wait won't work because the primary thread is in an infinite loop
time.sleep(0.5)
self.assertEqual(l[0], 1)
# Kill the embedded threadloop by sending stop onto the stack
# Threadloop puts STOP back onto the queue when it STOPs so this kills both loops
wq.stop()
# Make sure wq has stopped
self.assertFalse(wq.pool[0].is_alive())
def test_wait(self):
# __doc__ (as of 2008-06-28) for pygame.threads.WorkerQueue.wait:
# waits until all tasks are complete.
wq = WorkerQueue()
for i in range(2000):
wq.do(lambda x: x + 1, i)
wq.wait()
self.assertRaises(Empty, wq.queue.get_nowait)
wq.stop()
class ThreadsModuleTest(unittest.TestCase):
def test_benchmark_workers(self):
"""Ensure benchmark_workers performance measure functions properly with both default and specified inputs"""
"tags:long_running"
# __doc__ (as of 2008-06-28) for pygame.threads.benchmark_workers:
# does a little test to see if workers are at all faster.
# Returns the number of workers which works best.
# Takes a little bit of time to run, so you should only really call
# it once.
# You can pass in benchmark data, and functions if you want.
# a_bench_func - f(data)
# the_data - data to work on.
optimal_workers = threads.benchmark_workers()
self.assertIsInstance(optimal_workers, int)
self.assertTrue(0 <= optimal_workers < 64)
# Test passing benchmark data and function explicitly
def smooth_scale_bench(data):
transform.smoothscale(data, (128, 128))
surf_data = [Surface((x, x), 0, 32) for x in range(12, 64, 12)]
best_num_workers = threads.benchmark_workers(smooth_scale_bench, surf_data)
self.assertIsInstance(best_num_workers, int)
def test_init(self):
"""Ensure init() sets up the worker queue"""
threads.init(8)
self.assertIsInstance(threads._wq, WorkerQueue)
threads.quit()
def test_quit(self):
"""Ensure quit() cleans up the worker queue"""
threads.init(8)
threads.quit()
self.assertIsNone(threads._wq)
def test_tmap(self):
# __doc__ (as of 2008-06-28) for pygame.threads.tmap:
# like map, but uses a thread pool to execute.
# num_workers - the number of worker threads that will be used. If pool
# is passed in, then the num_workers arg is ignored.
# worker_queue - you can optionally pass in an existing WorkerQueue.
# wait - True means that the results are returned when everything is finished.
# False means that we return the [worker_queue, results] right away instead.
# results, is returned as a list of FuncResult instances.
# stop_on_error -
## test that the outcomes of map and tmap are the same
func, data = lambda x: x + 1, range(100)
tmapped = list(tmap(func, data))
mapped = list(map(func, data))
self.assertEqual(tmapped, mapped)
## Test that setting tmap to not stop on errors produces the expected result
data2 = range(100)
always_excepts = lambda x: 1 / 0
tmapped2 = list(tmap(always_excepts, data2, stop_on_error=False))
# Use list comprehension to check all entries are None as all function
# calls made by tmap will have thrown an exception (ZeroDivisionError)
# Condense to single bool with `all`, which will return true if all
# entries are true
self.assertTrue(all(x is None for x in tmapped2))
def todo_test_tmap__None_func_and_multiple_sequences(self):
"""Using a None as func and multiple sequences"""
self.fail()
res = tmap(None, [1, 2, 3, 4])
res2 = tmap(None, [1, 2, 3, 4], [22, 33, 44, 55])
res3 = tmap(None, [1, 2, 3, 4], [22, 33, 44, 55, 66])
res4 = tmap(None, [1, 2, 3, 4, 5], [22, 33, 44, 55])
self.assertEqual([1, 2, 3, 4], res)
self.assertEqual([(1, 22), (2, 33), (3, 44), (4, 55)], res2)
self.assertEqual([(1, 22), (2, 33), (3, 44), (4, 55), (None, 66)], res3)
self.assertEqual([(1, 22), (2, 33), (3, 44), (4, 55), (5, None)], res4)
def test_tmap__wait(self):
r = range(1000)
wq, results = tmap(lambda x: x, r, num_workers=5, wait=False)
wq.wait()
r2 = (x.result for x in results)
self.assertEqual(list(r), list(r2))
def test_FuncResult(self):
"""Ensure FuncResult sets its result and exception attributes"""
# Results are stored in result attribute
fr = FuncResult(lambda x: x + 1)
fr(2)
self.assertEqual(fr.result, 3)
# Exceptions are store in exception attribute
self.assertIsNone(fr.exception, "no exception should be raised")
exception = ValueError("rast")
def x(sdf):
raise exception
fr = FuncResult(x)
fr(None)
self.assertIs(fr.exception, exception)
################################################################################
if __name__ == "__main__":
unittest.main()
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